anthropology Essay -- essays research papers

Anthropology proves to be satisfying and intellectually fulfilling to many in the field. However, there are also many challenges and bumps in the road along the way. Napolean A. Chagnon and Claire Sterk faced many of these challenges themselves. During his fieldwork with the Yanomamo, Chagnon faced many challenges interacting with the natives. Chagnon could not practically communicate with the people until about six months after he arrived. He notes ? the hardest thing to live with was the incessant, passioned, and often aggressive demands they would make.? An example of this is the natives threatening with a shout such as; ?If you don?t take me with you on your next boat trip to Widokalyateri, I?ll chop a hole in your canoe!? While trying to collect genealogies, Chagnon found it very frustrating and commented ? I could not have deliberately picked a more difficult people to work with in this regard.? This was because he first tried to use the names they called each other, not knowing that the names they called each other were completely ambiguous and didn?t mean anything. He then later found out , after collecting all the genealogical information, that only the living members were accurate and the deceased listed were mostly fake. He had to start all over. ( Chagnon 5) Sterk did a different type of study on prostitution and how it went on during a time when AIDS was a major problem. This type of fieldwork is ethnographic fieldwork. Sterk had to get established in rough neig...

Biggie Smalls Is the Illest

Authenticity defines what is ‘real’ and what is not. Having ones own genuine, homegrown swagger and to then continue to maintain that strut as ones career (or life in general) carries on. The most prominent aspect to being authentic is having the courage to design entirely new, different and altered concepts and bring them into the mainstream, or at the very least attempt to do so. Turn the page to 19990’s hip-hop. The Rock N’ Roll era was over and it was time for a new genre to takeover. The 90’s contained so much diversity in it’s sound to the point where it started a phenomenon; the rap game.Within this frenzy of shootings, gang pride, and territorial disputes came one of the greatest hip hop artists to ever live. His sound had a Jamaican ring to it, thanks to his mother who was a Jamaican native. His deep ‘uh-n’s in his tracks were so organic that it was good enough to get his name out throughout Jamaica Queens, NY and then ev entually to the desk of P. Diddy. Diddy is often recognized as the ‘founding father’ of the Notorious B. I. G. When the 90’s reached their midpoint, Biggie Smalls and Diddy had created an empire which they called Bad Boy records.As both their business senses grew keener, so did the killer instinct of the west coast rap artists. Unfortunately, so much hype was surfaced in the media pertaining to the differences between East Coast style and West Coast style, so much that the murder rates were skyrocketing in major cities†¦and nobody saw an end in sight. The media brought the two most prominent figures into question; Christopher Wallace and Tupac Shakur. Now, there is a theory of a ‘beef’ between these two rappers that happened one night but it will take much too long to explain.In the end, Christopher Wallace was shot while visiting California, doing a tour on the West Coast. From there it’s all history. Christopher â€Å"Biggie Smallsâ₠¬  Wallace left his ginormous Timberland boot-print on hip hop forever. His audacity lead him to create a whole new sound in hip hop, a sound that made people bump and dance to in the NY clubs. No body wanted to listen to Ice Cube or Dr. Dre bellow about crack rocks and cutting people. Sure, Biggie has drug and weapon references, but that’s hip hop.That is how it has always been, and Biggie changed the face of rap by his unique talents and finding his own authentic sound. Brooklyn stand up. â€Å"To protect my position, my corner, my layer While we out here, say the hustlas prayer If the game shakes me or breaks me I hope it makes me a better man Take a better stand Put money in my moms hand Get my daughter this college plan, so she don't need no man Stay far from timid Only make moves when ya heart's-in-it And live the phrase Sky's The Limit† The Notorious B. I. G. â€Å"Sky’s The Limit† featuring 112 Life After Death (Disc 2) (1997)

Pride and Prejudice Essay - 3860 Words

Pride and Prejudice The novel Pride and Prejudice written by Jane Austen was originally to be called First Impressions. Hence the ultimate aim of this essay is to identify how successful this novel is in giving ‘First Impressions’ of the characters. The focus of this essay is on the opening chapters of the novel as this is where we are first introduced to the characters. ‘It is a truth universally acknowledged that a single man in possession of a good fortune must be in want of a wife.’ This is one of Austen’s famous quotes and sums up the main theme of the novel; that in the time this novel was written all men with a good wage are eligible bachelors in finding a woman to marry. I would consider this idea to be put under†¦show more content†¦Due to Lydia’s wrong doings the Bennett’s have descended in the hierarchy. The only way the Bennett sisters can redeem their reputation, status in society and moreover be able to get married to someone in their own class is if Lydia Bennett marries Mr. Wickham. Today such a situation wouldn’t be frowned upon; however in Austen’s day there would be harsh consequences. Ultimately, this indicates the difference in social historical background. Jane Austen began writing the novel during the turn of the century in 1796, as she was writing the novel she wished to call it First Impressions. However, after much re-drafting the novel was published under the title Pride and Prejudice in 1813. Jane Austen was born in Steventon, Hampshire on 10th December 1775. She was the daughter of a clergyman and one of 8 children. Many thought that Jane wrote her novels on the basis of her social knowledge as this is all she knew about and believed she was unaware of major world events. Strictly speaking this is incorrect. Her brothers, to whom she was very close, were involved in political and military matters and she was informed by them any major events that had taken place in the world. It was her own choice to write about social issues and possibly may have chosen to write in this style as she could have personally experienced the events that she based the novel on, showing authenticity. Why is this novel still popular today? Jane Austen’sShow MoreRelated Essay on Prejudice and Pride in Pride and Prejudice1535 Words   |  7 PagesPrejudice and Pride in Pride and Prejudice      Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   In any literary work the title and introduction make at least some allusion to the important events of the novel. With Pride and Prejudice, Austen takes this convention to the extreme, designing all of the first and some of the second half of the novel after the title and the first sentence. The concepts of pride, prejudice, and universally acknowledged truth (51), as well as the interpretation of those concepts, are the central focus ofRead MorePride And Prejudice By Pride Essay990 Words   |  4 PagesThe Effects of Pride Pride is the feeling of satisfaction when someone achieve something, someone close to you achieves something, or something somebody owns or has is admired by others. Being proud of yourself or someone else is not always bad. However, some believe pride is negative and can change how a person thinks and feels about certain things. It can be taken either way depending on who, why, and when it is. Many people have written articles and have done research to determine whether itRead More The roles of pride and prejudice in Pride and Prejudice1404 Words   |  6 PagesBecoming an immediate success in the contemporary novel public in early nineteenth century, Pride and Prejudice has proved to be the most popular of Jane Austens novels and remains a classic masterpiece two centuries later. The title itself describes the underlying theme of the book. Pride and prejudice, intimately related in the novel, serve as challenges to the cherished love story of Darcy and Elizabeth. It is interesti ng to see how these two nice people were blinded before realizing that theyRead MorePride and Prejudice1472 Words   |  6 PagesElizabeth#8217;s Pride and Darcy#8217;s Prejudice? Jane Austen#8217;s Pride and Prejudice is a timeless social comedy which is both satirical and full of sentiment. The title refers to the personalities of the two main characters and cues the reader to Austen#8217;s broader thematic purpose: to satirize nineteenth century manners and morals, especially as they relate to courtship and manners. Although both characters contain both these traits, it is mainly Mr. Darcy who exemplifies #8216;pride#8217;Read More Pride and the Prejudice 1543 Words   |  7 Pagesâ€Å"The power of doing anything with quickness is always prized much by the possessor, and often without any attention to the imperfection of the performance.† (1) Said Mr Darcy. This is one of the worlds most popular novels, Jane Austens Pride and Prejudice has charmed readers since its publication of the story of the amusing Elizabeth Bennet and her relationship with the aristocrat Fitzwilliam Darcy. During this essay it will explore the construction of characters , in particular it will be ElizabethRead MorePride and Prejudice2105 Words   |  9 Pagesrelationship, although back then divorce was never thought of either, where as today it is not rare at all. In these marriages, money was the only consideration. Love was left out, with the thought that it would develop as the years went by. In Pride and Prejudice, Jane Austen comments that marriage in her time is a financial contract, where love is strictly a matter of chance. This is clearly evident from the very first line of the novel. Charlotte Lucas states that happiness in marriage is entirelyRead MorePride and Prejudice1236 Words   |  5 PagesThe path to marriage initiates in the very first paragraph of Jane Austen’s Pride and Prejudice. This courtship novel begins with the premise that â€Å"a single man in possession of a fortune must be in want of a wife† (pg. 5) Throughout the competition for the single men, characters are naturally divided by the norms of their social standing. However, the use of social conventions and civility further divides them. The characters in need of the most moral reform remain unchanged, leaving a path forRead MorePride and Prejudice1906 Words   |  8 PagesPride and Prejudice tells a story of a young girl in the midst of a very materialistic society. Jane Austen uses the setting to dramatize the restraints women had to endure in society. As the novel develops, we see how women have to act in a way according to their gender, social class, and family lineage. Elizabeth Bennet’s sisters represent the proper societal lady while Lizzy is the rebel. Through her characters Austen shows how a women’s happiness came second to the comfort of wealth. As the plotRead MoreIrony in Pride and Prejudice995 Words   |  4 PagesIrony in Pride and Prejudice Irony forms the alma mater of Jane Austen’s novels. Likewise, â€Å"Pride and Prejudice† is steeped in irony of theme, situation, character, and narration. Austen uses it to establish the contrast between appearance and reality. As one examines â€Å"Pride and Prejudice†, one discovers the ironic significance of how pride leads to prejudice and prejudice invites pride. Importantly, the novel elucidates how both â€Å"Pride† and â€Å"Prejudice† have their corresponding virtues bound upRead More Essay on the Irony of Pride in Pride and Prejudice1262 Words   |  6 Pagesof Pride in Pride and Prejudice      Ã‚  Ã‚   Jane Austen uses the elements of both pride and prejudice to develop the satire in her novel. Austen presents pride as both a vice and a virtue. Austen first introduces pride as a vice of arrogance and prejudice, but as the characters in the novel develop so does the concept of pride. Towards the end of the novel pride becomes the vehicle for many of the noble actions taken by the main characters. Austen skillfully interweaves the two parts of pride, the

Using the Spanish Verb Ganar

Ganar is a common Spanish verb that has as its basic sense the idea of accomplishment. As such, it can be translated to English in a variety of ways, depending on the context: to earn, to win, to reach, to defeat, to improve. Ganar is a cousin of the English gain and sometimes has that meaning as well. Ganar Meaning ‘To Earn’ In one of its most common usages, ganar is used to refer to how much money a person or business earns:  ¡Gana 80.00 dà ³lares solo por suscribirte a nuestro programa! (Earn $80 just for subscribing to our program!)Cada profesional ganarà ¡ 18.450 pesos uruguayos por mes. (Each professional will earn 18,450 Uruguayan pesos per month.)La compaà ±Ãƒ ­a ganaba muy poco dinero. (The company earned very little money.) Ganar Meaning ‘To Win’ Ganar can mean win in various senses: Adams ganà ³ la loterà ­a dos veces, en 1985 y 1986. (Adams won the lottery twice, in 1985 and 1986.)La empresa ganaba muchas veces en licitaciones internacionales. (The company won often in international bidding.)Carter ganà ³ el voto popular por un 50,1% contra 48,0% de Ford. (Carter won the popular vote with 50.1 percent against Fords 48.0 percent.)Entre 1936 y 1951 fue la estrella de los Yankees de Nueva York, equipo con el que ganà ³ nueve Series Mundiales. (Between 1936 and 1951 he was the star of the New York Yankees, the team that won nine World Series.)Ganaron los Cavaliers. (The Cavaliers won.)No ganamos la guerra contra las drogas. (We arent winning the war against drugs.) Ganar as a Verb of Achieving Ganar often conveys the sense of achievement. Translations to English can vary substantially: Ganà ³ mucho à ©xito escribiendo sobre los problemas de su ciudad. (He was very successful writing about his citys problems.)El Congreso ganà ³ su objetivo principal. (The Congress achieved its main goal.)Al menos 73 escaladores ganaron la cima el lunes. (At least 73 climbers reached the summit on Monday.)Las voces de los soldados ganaron intensidad cuando llegaron a la orilla. (The voices of the soldiers rose in intensity when they arrived at the shore.)Bolivia ganà ³ un escalà ³n, ubicà ¡ndose en el sitio 10 del ranking. (Bolivia reached a milestone, planting itself in 10th place.)   Using the Verbal Phrase Ganar En Ganar en can mean to improve or to gain in. Perdà ­ mi libertad, pero ganà © en felicidad. (I lost my freedom, but I became happier. Literally, I lost my freedom, but I gained in happiness.)Pablo y Marà ­a ganaron en fortaleza. (Pablo y Marà ­a became stronger. Literally, Pablo y Marà ­a gained in strength.) Ganarse The reflexive form ganarse usually means to deserve or otherwise suggests extraordinary effort. It also is frequently used to refer to those who win a lottery or drawing. Los atletas colombianas se ganaron la medalla de oro. (The Colombian athletes deserved the gold medal.)La compaà ±ia se ha ganado la reputacià ³n de là ­der innovador. (The company has deservedly earned its reputation as an innovative leader.)La felicidad invadià ³ a los 20 empleados, quienes se ganaron millones de dà ³lares. (Happiness overwhelmed the 20 employees, who won millions of dollars.)Al fin me ganà © la confianza y el respeto de su familia. (Finally I obtained the trust and respect of her family.) Using the Noun Form Gana Although you might expect that the noun form gana would refer to earnings or gains, it instead refers to the desire or appetite for something. It usually is used in the plural form.  ¿Que le dirà ­as a alguien que no tiene ganas de vivir? (What would you say to someone who doesnt have the desire to live?)Mis ganas de entender la vida y el mundo me llevaron a estudiar filosofà ­a en la universidad. (My desire to understand life and the world led me to study philosophy at the university.)Quiero ganas de hacer algo que no haya hecho nunca. (I want the desire to do something that has never been done before.) Etymology of Ganar Unlike most other Spanish verbs, ganar probably isnt of Latin origin. According to the Royal Spanish Academys dictionary, ganar possibly came from a Gothic word ganan, which meant to covet, along with Germanic and Nordic influences from words related to hunting, harvesting, and envy. Ganar and the English gain may be related to an ancient Proto-Indo-European root referring to striving. Key Takeaways Ganar often means to win or to earn and usually refers to having an accomplishment.The noun form is often used in the plural, ganas, and usually refers to a desire.The reflexive form ganarse often carries the idea of having an achievement due to a strong effort.

Examining how Brutus and Mark Anthony Utilise Language to...

Examining how Brutus and Mark Anthony Utilise Language to Manipulate the Audience in Act 3 Scene 2 of Julius Caesar This essay will scrutinize and analyse two speeches from Julius Caesar; firstly Brutuss funeral oration and Mark Anthonys response in Act 3 Scene 2. Brutus as a conspirator against Caesar addresses the audience to justify himself along with his other conspirators actions whilst Mark Anthony speaks in Caesars defence and Brutus prosecution. This essay will explore how each character uses rhetorical devices to appeal to the audience. Brutus uses rhetorical questions throughout his oration to the plebeians in Act 3 Scene 2. He uses this in order to create a sense of support for†¦show more content†¦By purposely not using murdered in place of slain, he creates an effect on the audience to believe that the killing of Caesar wasnt brutal and that it was for a good cause. The audience cherish Rome, so Brutus clarifies that Rome is more important than Caesar. Brutus persuades the audience by speaking for the good of Rome. His repetition of the personal pronoun of I shows that he is once again distancing himself from the blame. Brutus uses this third person narrative of himself effectively in order to convince the crowd that even if he wasnt Brutus, the loyal and trustworthy friend of Caesar, he would of still murdered Caesar. His announcement of that he will slay himself in order to please Rome, reinforces his love for Rome and this creates and effect on the people to show that he is still a noble roman. Throughout Brutus funeral oration the audience and the reader notice a structure and logic of themes. The structure has assisted his oration to manipulate the audience in to believing his defence and ideas. For instance Here comes his body mourned by Mark Anthony: who though he had no hand in his death, shall receive the benefit of his dying, a place in the commonwealth. Here Brutus is suggesting that the murder of Caesar has resulted beneficial for those who have no role in the murder. Moreover, Brutus provides a logical justification for his and

Misconception of Religion Free Essays

Ryan Wood Alicia Alexander Eng. 131 2, November 2010 Misconception of Religion in â€Å"The Gospel According to Mark† and â€Å"A Very Old Man with Enormous Wings. † In the two short stories both authors, Jorge Luis Borges in â€Å"The Gospel According to Mark† and Gabriel Garcia Marquez in â€Å"A Very Old Man with Enormous Wings† use religion as examples on how different individuals use and believe in it. We will write a custom essay sample on Misconception of Religion or any similar topic only for you Order Now As we read the story’s we will see how religion is sometimes misconceived and misinterpreted by people so they can benefit in their own personal lives, and personal well-being.In the stories both characters are seemed to be looked at as maybe something they are not. This will lead us to the misconception and misunderstanding that people have on religion and beliefs. In the short story â€Å"The Gospel According to Mark† the main character Baltasar Espinosa is seemed to be looked at like a God by a family that does not know much about religion or the Bible. The Gutres are a small family that seems to be looking for a religious figure they can believe in since they do not understand religious beliefs. In â€Å"A Very Old Man with Enormous Wings† Pelayo and his wife Elisenda find an old man with wings in front of their house.They believe he could be an angel and decide to lock him inside a chicken coup. They believe he could be there for their sick child but at first there not quite sure. As the two stories evolve we will see how both families use Baltasar Espinosa, and the Old Man to gain advantages in their own lives. In Marquez story, â€Å"A Very Old Man with Enormous Wings† we see an example of how Elisenda starts using the Old Man to reap personal benefits. The narrator says, â€Å"Elisenda, her spine all twisted from sweeping up so much marketplace trash, then got the idea of fencing in the yard and charging five cents admission to see the angel† (354).As we read Borges story, â€Å"The Gospel According to Mark† the narrator says, â€Å"The next day began like all the others, except that the father spoke to Espinosa to ask whether Christ had allowed himself to be killed in order to save all mankind† (347). Later we find out that the family decides to crucify Espinosa because they might believe him to be a spiritual character and it could benefit the family in some way. They also find out that something has happened between Espinosa and the daughter. In both stories there seems to be a religious character there to help both families in some sort of way.In â€Å"The Gospel According to Mark† the family seems like they take to Espinosa and follow him and learn from him. Where in â€Å"A Very Old Man with Enor mous Wings† the family is not sure of him and decides not to take the Old Man in and learn his reasons for being there. â€Å"Pelayo watched over him all afternoon from the kitchen, armed with his bailiff’s club, and before going to bed he dragged him out of the mud and locked him up with the hens in the wire chicken coop† (353). Instead of trying to figure out why he was there, they were more afraid of him and worried about what he could be.In Borges story, â€Å"The Gospel according to Mark† the narrator says, â€Å"The move brought Espinosa and the Gutres closer, and they began to eat together in the large dining room† (345). As both stories evolve we see some contrast in the two families even though religion is a constant topic. Both stories have similar meaning to them, but both authors use religion and religious beliefs in different ways. As the two stories come to an end we see that both families lose their perception on what they were focusing on throughout the stories.In â€Å"A Gospel According to Mark† the family decides to kill the religious figure that has been teaching them the Gospel. This has irony because the Bible strictly talks about death and murder, even though the family seems upset about what Espinosa has done to the daughter. The narrator says, â€Å"There was no roof on the shed; they had torn down the roof beams to build the Cross† (348). In â€Å"A Very Old Man with Enormous Wings† Elisenda is relieved more than happy when she sees the Old Man fly away.This has irony as well because they used him to make money and benefit in their own life. After they used him, she feels happy that he is gone and is no longer a nuisance. The narrator states, â€Å"Elisenda let out a sigh of relief, for herself and him, when she saw him pass over the last houses, holding himself up in some way with the risky flapping of a senile vulture† (357). The conclusion to the stories is religion can be used positively or negatively depending on who the person is and what their intentions are. How to cite Misconception of Religion, Papers

Biology in Daphnia Essay Example For Students

Biology in Daphnia Essay Teachers Guide. qxd 25/1/08 8:00 Page 1 Teacher/Lecturer A1. 21L CORE Activity 1. 21 Does caffeine affect heart rate? Purpose †¢ †¢ To investigate the effect of caffeine on the heart rate of Daphnia (water fleas). To highlight experimental and investigative assessment objectives. Safety Any student known to suffer from photosensitive epilepsy should be warned before a stroboscopic light is used. Flickering lights in the range 5–30 Hz are thought to trigger seizures in sensitive individuals. Notes on the procedure The student sheet that accompanies this activity guides students through planning and writing up this investigation. After students plan the investigation their plans can then be discussed with the group. To support less able students, or to help with the organisation of practical work for a large group, students could be given the practical procedure at the end of these notes (see page 3). It provides a basic outline and will need to be read by students before starting the practical with decisions and modifications made as appropriate. The procedure is for a simple experiment; more able students could complete a more complex experiment using serial dilutions, with several Daphnia used at each concentration. Note that high concentrations of caffeine can be fatal for Daphnia. The Daphnia hearts are fairly easily seen but counting the number of beats can be difficult. Counting is easier if each heartbeat is recorded by tapping a pencil on a piece of paper and counting up the pencil marks after the specified time. In addition, cooling the Daphnia before the experiment may help slow their heart rate. An ICam above the eye-piece of the microscope to project an image of the slide onto a large screen may also help with counting. Foster, in the Journal of Biological Education (1997) 31, pp. 53–255, provides a method using a stroboscope to freeze the motion. Use of the stroboscope may overcome the problems of counting faster heart rates. However, we would not recommend this method. Positioning the light sources and strobe is tricky. It is very difficult to freeze the motion and viewing with a strobe light can cause eye strain and dizziness. A simpler approach is to count the rate at which the legs beat. This rate is proportional to the rate at which the heart beats. A dissecting microscope with a light source under the stage works well for this experiment. To prevent the Daphnia from overheating while on the microscope turn off the microscope light between observations and use a heat sink – a cavity tile filled with iced water placed on the microscope under the slide. Using pond water/Daphnia culture solution is recommended for both the control group and to dissolve the caffeine as this may give more valid results and be less stressful to the Daphnia. In distilled water the heart rate may rise due to lack of oxygen. Edexcel practical materials created by Salters-Nuffield Advanced Biology,  ©University of York Science Education Group. 1 Teachers Guide. qxd 5/1/08 8:00 Page 2 Teacher/Lecturer A1. 21L CORE Activity 1. 21 Does caffeine affect heart rate? In the trial of the experiment caffeine was used at 0. 1% and 0. 5% w/v with no ill effect. At 1% the Daphnia stopped swimming after 5 minutes. It is suggested that a ‘blind’ study is done. This means that the person counting the heart rate is unaware as to whether th e Daphnia is in water with or without caffeine. It has been shown that observer expectations influence the result. It is difficult to get clear-cut results from this experiment and significant differences between treatments may not be found. The sets of results below indicate the sorts of results that can be expected. It should be impressed upon students that it does not matter if they do not get differences between treatments. Indeed, the experiment provides plenty of opportunity to evaluate critically the technique used and really focus attention on the experimental skills aspect of this activity. Experiment 1 Daphnia were cooled on ice before the experiment. Beakers containing Daphnia in pond water were put on ice for about half an hour. This had the effect of slowing the heart rate and thus facilitating counting. The temperature of the pond water in which the Daphnia were swimming fell to about 5 oC. A single Daphnia was placed in a beaker containing test solution for 5 minutes: either pond water or pond water + 0. 5% caffeine. After the 5 minutes, the Daphnia (in a few drops of test solution) was transferred to the slide for measurement of heart rate. Each individual was counted for 4 _ 30 seconds. A blind counting method was used. Overall means: Caffeine – 173 beats per minute Control – 172 beats per minute There were no immediately observable ill effects of caffeine at this concentration (0. 5% w/v). Experiment 2 The Ultimate Revenge from Medea EssayIf a stroboscope is used to show the Daphnia’s heart rate and you know you suffer from photosensitive epilepsy tell your teacher and take appropriate precautions. Caffeine Plants produce caffeine as an insecticide. Cocoa in South America, coffee in Africa and tea in Asia have all been used for hundreds of years to produce ‘pick me up’ drinks containing caffeine. These days, caffeine is also used as a flavour enhancer in a wide range of cola and other soft drinks. In addition, it has medicinal uses in aspirin preparations, and is found in weight-loss drugs and as a stimulant in students’ exam-time favourites like Pro-plus and Red Bull. At high levels of consumption caffeine has been linked to restlessness, insomnia and anxiety, causing raised stress and blood pressure. This can lead to heart and circulation problems. Procedure Making a hypothesis What do you think will be the effect of caffeine on the heart rate of water fleas? Write down your ideas and support your prediction by presenting biological knowledge which supports the idea. You now have an idea (hypothesis) to test. Planning The beating heart of a water flea can be seen through its translucent body, by placing the flea in a few drops of water in a cavity slide. A cover slip helps stop the water evaporating. The following equipment will be available: †¢ †¢ †¢ †¢ †¢ Culture of Daphnia (water fleas) Cavity slides Dropping pipettes Distilled water Caffeine tablets †¢ †¢ †¢ †¢ †¢ Cotton wool Standard glassware (beakers, measuring cylinders, etc. ) Stopclock Paper towels or filter paper Microscope Produce a detailed plan for an experiment that allows you to test your hypothesis about the effect of caffeine on the heart rate of water fleas. Edexcel practical materials created by Salters-Nuffield Advanced Biology,  ©University of York Science Education Group. 5 Teachers Guide. qxd 25/1/08 8:00 Page 6 Student A1. 21L CORE Activity 1. 21 Does caffeine affect heart rate? In your plan, make sure you include the following: †¢ Select suitable apparatus that will give you measurements which will validly test your hypothesis. Explain why the apparatus is suitable and how the results will let you test the hypothesis. Include a risk assessment, identifying any risks and explaining any safety precautions that need to be taken so as to reduce those risks. Comment on the ethical issues that arise from using living organisms in the experiment and explain how these will be taken into account in the practical method used. Identify the dependent and independent variables, and indicate how relevant variables will be controlled. Show how you will ensure that reliable and valid results are produced, and describe what you will do to ensure that measurements are precise, accurate and repeatable. Identify any potential errors in readings that can be systematic (values differing from the true value by the same amount) or random (values equally likely to lie above or below the true value). †¢ †¢ †¢ †¢ †¢ Edexcel practical materials created by Salters-Nuffield Advanced Biology,  ©University of York Science Education Group. 6